Why Obama doesn't speak from the Oval Office

"Each time, the format is the same. Walk down the hall. Speak, centered at the vanishing point of the hall, drawing the viewer toward the center of the frame. Turn around, walk away. I am the president. You wait for me. I have said all I have to say, and now I am walking away. This is not my work. My work is back there. And I gotta get back to work... "  Read it all.     [BJS]